Determination of oil content in oil modified o-phthalic polyester resins by infrared spectrometry

1979 ◽  
Vol 51 (4) ◽  
pp. 499-501 ◽  
Author(s):  
James A. Vance ◽  
N. Bradford. Brakke ◽  
Paul R. Quinney
Keyword(s):  
Oil Content ◽  
Infrared Spectrometry ◽  
Polyester Resins

Methods for Determination of Oil and Grease Contents in Wastewater from the Petroleum Industry

2016 ◽  
Vol 10 (4) ◽  
pp. 437-444 ◽  
Author(s):  
Ilma Cirne ◽  
◽  
Jaime Boaventura ◽  
Yuri Guedes ◽  
Elizabete Lucas ◽  
...  
Keyword(s):  
Oil Content ◽  
Produced Water ◽  
Petroleum Industry ◽  
Infrared Spectrometry ◽  
Residual Oil ◽  
Oil And Grease ◽  
Oil Concentration

Infrared spectrometry and spectrofluorimetry methods were correlated in the measurement of oil concentration in produced water. Furthermore, we compared colorimetry and gravimetry techniques. Adsorption experiments were performed in synthetic oily wastewaters by polymer compounds based on poly(hydroxyethyl acrylamide and polypropylene. The residual oil content was used in the techniques correlation.

DETERMINATION OF MICRO-AMOUNTS OF 5β-PREGNAN-3α-OL-20-ONE IN URINE USING INFRARED-SPECTROMETRY

1962 ◽  
Vol 41 (2) ◽  
pp. 234-246 ◽  
Author(s):  
H. J. van der Molen
Keyword(s):  
Infrared Spectrum ◽  
Quantitative Determination ◽  
Acid Hydrolysis ◽  
Chromatographic Separation ◽  
Pure Form ◽  
Infrared Spectrometry ◽  
Hydrolysis Of

ABSTRACT A procedure for the quantitative determination of 5β-pregnan-3α-ol-20-one in urine is described. After acid hydrolysis of the pregnanolone-conjugates in urine, the free steroids are extracted with toluene. Pregnanolone is isolated in a pure form as its acetate; after chromatographic separation of the free steroids on alumina, the fraction containing pregnanolone is acetylated and rechromatographed on alumina. Quantitative determination of the isolated pregnanolone-acetate is carried out with the aid of the infrared spectrum recorded by a micro KBr-wafermethod. The reliability of the method under various conditions is discussed under the headings, specificity, accuracy, precision and sensitivity. It is possible to determine 30–40 μg pregnanolone in a 24-hours urine portion with a precision of 25%.

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